Picking a random move in exploitation in Q-Learning
It depends on the implementation of the software package that you are using. If you call a function that returns the maximum value and all values are the same then it might return the value at first index or some other one. The point is it doesn't matter which action is chosen since all of them are the best at the same time. So it's basically random but you should treat it as if you are trying to pick the best action.